SIST EN 62489-2:2014

SLOVENSKI STANDARD
SIST EN 62489-2:2014
01-december-2014
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Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 2:
Methods of calculating and measuring the low-frequency magnetic field emissions from
the loop for assessing conformity with guidelines on limits for human exposure
Ta slovenski standard je istoveten z: EN 62489-2:2014
ICS:
11.180.15 3ULSRPRþNL]DJOXKHRVHEHLQ Aids for deaf and hearing
RVHEH]RNYDURVOXKD impaired people
17.140.50 Elektroakustika Electroacoustics
SIST EN 62489-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62489-2:2014

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SIST EN 62489-2:2014


EUROPEAN STANDARD EN 62489-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2014
ICS 17.140.50 Supersedes EN 62489-2:2011
English Version
Electroacoustics - Audio-frequency induction loop systems for
assisted hearing - Part 2: Methods of calculating and measuring
the low-frequency magnetic field emissions from the loop for
assessing conformity with guidelines on limits for human
exposure
(IEC 62489-2:2014)
Electroacoustique - Systèmes de boucles d'induction Akustik - Audiofrequenz-Induktionsschleifenanlagen zur
audiofréquences pour améliorer l'audition - Partie 2: Unterstützung von Hörsystemen - Teil 2: Verfahren zur
Méthodes de calcul et de mesure des émissions de champ Berechnung und Messung der niederfrequenten
magnétique basse fréquence à partir de la boucle pour Emissionen des durch die Schleife erzeugten Magnetfeldes
l'évaluation de la conformité aux instructions sur les limites zur Einschätzung der Konformität mit Richtlinien zu
d'exposition humaine Grenzwerten für die Belastung des Menschen
(CEI 62489-2:2014) (IEC 62489-2:2014)
This European Standard was approved by CENELEC on 2014-10-29. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 62489-2:2014 E

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SIST EN 62489-2:2014
EN 62489-2:2014 - 2 -
Foreword
The text of document 29/847/FDIS, future edition 2 of IEC 62489-2, prepared by IEC/TC 29
"Electroacoustics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 62489-2:2014.
The following dates are fixed:
(dop) 2015-07-29
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2017-10-29
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 62489-2:2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62489-2:2014 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 62233 NOTE Harmonized as EN 62233.
IEC 62311:2007 NOTE Harmonized as EN 62311:2008 (modified).

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SIST EN 62489-2:2014
- 3 - EN 62489-2:2014
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60118-4 2006 Electroacoustics - Hearing aids - EN 60118-4 2006
Part 4: Induction loop systems for hearing
aid purposes - Magnetic field strength
IEC 60268-1 1985 Sound system equipment - HD 483.1 S2 1989
Part 1: General
IEC 60268-2 1987 Sound system equipment - HD 483.2 S2 1993
Part 2: Explanation of general terms and
calculation methods
IEC 60268-10 1991 Sound system equipment - HD 483.10 S1 1993
Part 10: Peak programme level meters

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SIST EN 62489-2:2014

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SIST EN 62489-2:2014




IEC 62489-2

®


Edition 2.0 2014-09




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Electroacoustics – Audio-frequency induction loop systems for assisted

hearing –

Part 2: Methods of calculating and measuring the low-frequency magnetic field


emissions from the loop for assessing conformity with guidelines on limits for

human exposure




Électroacoustique – Systèmes de boucles d’induction audiofréquences pour

améliorer l'audition –

Partie 2: Méthodes de calcul et de mesure des émissions de champ magnétique

basse fréquence à partir de la boucle pour l’évaluation de la conformité aux

instructions sur les limites d’exposition humaine








INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX P


ICS 17.140.50 ISBN 978-2-8322-1860-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 62489-2:2014
– 2 – IEC 62489-2:2014 © IEC 2014
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Rated values . 6
4 Situation regarding current standards . 6
5 Configurations of loops . 7
5.1 Main types of configuration . 7
5.2 General considerations . 7
5.3 Large-area loops . 7
5.4 Medium-area loops . 7
5.5 Small-area loops . 8
5.6 Solenoid antennas . 8
6 Calculations . 8
6.1 General . 8
6.2 Solenoid antennas . 9
7 Measurements . 9
7.1 General . 9
7.2 Input signal . 9
7.3 Measuring instrument. 9
8 Comparison of calculated or measured results with guidelines or limits . 10
9 Meeting limits or guidelines . 10
10 Measurement uncertainty . 10
Annex A (informative) Rationale for this product-family magnetic field emission
standard for audio-frequency induction-loop systems (AFILS) in the context of human
exposure to non-ionizing radiation . 11
Bibliography . 14

Figure 1 – An ear-hook induction transducer, with a BTE (behind the ear) hearing aid
body for scale . 8
Figure A.1 – ICNIRP magnetic field reference levels . 11

Table 1 – Basic restrictions . 10
Table A.1 – Application to AFILS of Table 1 of IEC 62311:2007 "Characteristics and
parameters of the equipment to be considered" . 12

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SIST EN 62489-2:2014
IEC 62489-2:2014 © IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTROACOUSTICS –
AUDIO-FREQUENCY INDUCTION
LOOP SYSTEMS FOR ASSISTED HEARING –

Part 2: Methods of calculating and measuring the low-frequency
magnetic field emissions from the loop for assessing conformity
with guidelines on limits for human exposure

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62489-2 has been prepared by IEC technical committee 29:
Electroacoustics.
This second edition cancels and replaces the first edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
1
edition: it reflects several updates to the ICNIRP Guide [1] to which it makes frequent
________________
1
 Numbers in square brackets refer to the Bibliography.

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SIST EN 62489-2:2014
– 4 – IEC 62489-2:2014 © IEC 2014
reference. The most significant change is that the underlying metric in the Guide has been
changed from tissue current density to induced electric field.
The text of this standard is based on the following documents:
FDIS Report on voting
29/847/FDIS 29/854/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62489 series, published under the general title Electroacoustics –
Audio-frequency induction loop systems for assisted hearing, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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SIST EN 62489-2:2014
IEC 62489-2:2014 © IEC 2014 – 5 –
INTRODUCTION
A revision of IEC 62489-2 is necessary because, while the standard does not call up any
particular set of exposure limits, it has numerous references to the ICNIRP Guide, which has
profoundly changed between the 1998 and 2010 editions. This has resulted in a change in the
physical quantity on which the basic restrictions are established, from tissue current density to
induced electric field, resulting in changes to the reference levels and a considerable
simplification of the application of the guidelines.
The recommendations of the new Guide have not yet been adopted at the regulatory level in
the European Union. However, since the references to the Guide in IEC 62489-2 are purely
informative, it does not appear that this revision should be unacceptable in Europe.

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SIST EN 62489-2:2014
– 6 – IEC 62489-2:2014 © IEC 2014
ELECTROACOUSTICS –
AUDIO-FREQUENCY INDUCTION
LOOP SYSTEMS FOR ASSISTED HEARING –

Part 2: Methods of calculating and measuring the low-frequency
magnetic field emissions from the loop for assessing conformity
with guidelines on limits for human exposure



1 Scope
This part of IEC 62489 applies to audio-frequency induction-loop systems for assisted
hearing. It may also be applied to such systems used for other purposes, as far as it is
applicable. The standard is intended for assessment of human exposure to low-frequency
magnetic fields produced by the system, by calculation and by in-situ testing.
This standard does not deal with other aspects of safety, for which IEC 60065 applies, or with
EMC.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60118-4:2006, Electroacoustics - Hearing aids - Part 4: Induction loop systems for
hearing aid purposes - Magnetic field strength
IEC 60268-1:1985, Sound system equipment – Part 1: General
IEC 60268-2:1987, Sound system equipment – Part 2: Explanation of general terms and
calculation methods
IEC 60268-10:1991, Sound system equipment – Part 10: Peak programme level meters
3 Rated values
The term "rated" means "the value stated by the manufacturer". Rated values are of two
kinds: rated conditions, which are fundamental values that cannot be verified by
measurement, and others that can be so verified. For a full explanation, see IEC 60268-2.
4 Situation regarding current standards
Current published and draft IEC standards on EMF exposure can be ambiguous in their
guidance on the approach that should be taken by product committe
...